Available in a variety of sizes, the Therm a Rest Fast Light Stuff Sack is built to safely carry Therm a Rest NeoAir inflatable and Fast Light Series self inflating sleeping pads sold separately. Constructed of silicone impregnated nylon, the Fast Light Sack is lightweight, durable and water resistant. An integrated clip loop and end handle make it easy to pack and unpack your pad.Sold individually, the Therm a Rest Fast Light Sack is available in the following size options:Xsmall 3.75 x 9.5 Small 4.25 x 10Medium 4.75 x 13Regular 5.5 x 13.5Large 6.25 x 13.5XLarge 6.5 x 16 Small, 06689